One of the main goals of crossing different strains of cannabis is to make the plants more friendly in the grow room. This means plants that are smaller, easier to train, healthier, give higher yields and have shorter flowering times.
By crossing a slow maturing Sativa with a fast finishing Indica, the flowering time can be reduced substantially. Several breeding cycles can be used to stabilize the trait of fast flowering.
Take a look at AK-47 as a great example. This is a high THC, Sativa dominant hybrid that flowers in 50 days or less.
6. Every Reason that Autos are Cool